Magnetic Properties of Nanoparticle&amp;ndash;Polymer Composites Prepared Using Surface Modification and Cross-Linking Reaction

Microwave-absorptive polymeric composite materials are becoming important to protect interference of any communication sy stems due to the increase in the use of microwave-inducing devices. In this work, the microwave-absorptive polyurethane composites are prepared using natural zeolites of Sarulla North Sumatra and commercial ferric-oxide as fillers. Weight ratio of the natural zeolite to ferric oxide were varied (18:2; 16:4; 14:6; 12:8 and 10:10) by weight. The fillers are prepared using ball milling technique and characterized using Particle Size Analyzer for particle size distribution. The nanocomposites, prepared using in-situ reaction of polyethylene glycol and toluene diisocyanate, is characterized for physical and mechanical properties using tensile strength, thermal properties with TGA techniques, as well as morphological and chemical properties using scanning electron microscopy. Composition and loading of the nanofillers against polyurethane matrices is 20% by weight. Microwave-absorption properties of the nanocomposites is characterized using 8-12 GHz frequency. Tensile strengths of the natural zeolite-ferric oxides polyurethane nanocomposites shows higher values when matrices filled with lower ferric-oxide, which could be due to the nanozeolites have functioned as reinforcement for the polyurethane matrix through polar-polar interaction between the filler surfaces with the matrices. The microwave absorption properties, which investigated by Vector Network Analyzer, of the nanocomposites filled in polyurethane with the ratio of nanozeolite to ferric oxide filler of 12:8 shows reflection loss of -13.2 dB. This condition was observed at 11.1 GHz.

show abstract

In situ dispersion of non-aqueous Fe₃O₄ nanocolloids by microdroplet coalescence and their use in the preparation of magnetic composite particles

Wang

et al. 2016

Soft Matter

View full text Add to dashboard Cite

Monodispersity and size uniformity are critical issues for nanoparticles, especially for the inorganic particles dispersed in organic carriers serving as the precursor of composites. Herein, for the first time, we have developed a method based on flow-induced droplet coalescence for in situ dispersion of surface-modified Fe3O4 nanoparticles to prepare Fe3O4/polystyrene (Fe3O4/PS) composite particles. A plate-type microchannel was constructed to initiate droplet coalescence for reducing the water-oil interfacial area and for dispersing Fe3O4 nanoparticles into the precursor suspensions. Under optimized conditions, the precursor suspensions could be composed of monodispersed Fe3O4 nanoparticles with an average size of approximately 12 nm. In this case, the saturation magnetization of the prepared superparamagnetic composites was as high as 4.012 emu g(-1) at a magnetite content of 5 wt%. The method is simple and has great potential to be tailored for the preparation of non-aqueous suspensions with uniform and monodispersed nanoparticles.

show abstract

Magnetic Properties of Nanoparticle–Polymer Composites Prepared Using Surface Modification and Cross-Linking Reaction

Cited by 6 publications

References 14 publications

Synthesis, characterization and magnetic properties of Fe3O4 doped chitosan polymer

Synthesis, characterization and magnetic properties of Fe3O4 doped chitosan polymer

Preparation and Characterization of Microwave-absorption of Sarulla North Sumatra Zeolite and Ferric Oxide-filled Polyurethane Nanocomposites

In situ dispersion of non-aqueous Fe₃O₄ nanocolloids by microdroplet coalescence and their use in the preparation of magnetic composite particles

Contact Info

Product

Resources

About

Magnetic Properties of Nanoparticle&ndash;Polymer Composites Prepared Using Surface Modification and Cross-Linking Reaction

Cited by 6 publications

References 14 publications

Synthesis, characterization and magnetic properties of Fe3O4 doped chitosan polymer

Synthesis, characterization and magnetic properties of Fe3O4 doped chitosan polymer

Preparation and Characterization of Microwave-absorption of Sarulla North Sumatra Zeolite and Ferric Oxide-filled Polyurethane Nanocomposites

In situ dispersion of non-aqueous Fe3O4 nanocolloids by microdroplet coalescence and their use in the preparation of magnetic composite particles

Contact Info

Product

Resources

About

Magnetic Properties of Nanoparticle–Polymer Composites Prepared Using Surface Modification and Cross-Linking Reaction

In situ dispersion of non-aqueous Fe₃O₄ nanocolloids by microdroplet coalescence and their use in the preparation of magnetic composite particles